1. Department of Medical and Surgical Sciences - Pharmacology Unit; University of Bologna; Bologna
2. Local Health Authority Reggio Emilia
3. Local Health Authority Bologna
4. Local Health Authority Modena
5. Local Health Authority; Ferrara
6. Local Health Authority Parma
7. Local Health Authority Piacenza
8. Local Health Authority Forlì
9. Drug Policy Service; Emilia Romagna Region Health Authority; Bologna Italy